CVE-2026-83780
Microsoft Windows 10 Version 1607
- Microsoft Windows 10 Version 1607
- Critical
- CVSS 9.8
- EPSS 0.96%
- Fixed version listed
What to do
Fixed version listed
Affected products
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Windows 10 Version 1607 (32-bit Systems, x64-based Systems) | from 10.0.14393.0, before 10.0.14393.9612 | 10.0.14393.9612 |
| Microsoft Windows 10 Version 1809 (32-bit Systems, x64-based Systems) | from 10.0.17763.0, before 10.0.17763.9376 | 10.0.17763.9376 |
| Microsoft Windows Server 2016 (x64-based Systems) | from 10.0.14393.0, before 10.0.14393.9612 | 10.0.14393.9612 |
| Microsoft Windows Server 2016 (Server Core installation) (x64-based Systems) | from 10.0.14393.0, before 10.0.14393.9612 | 10.0.14393.9612 |
| Microsoft Windows Server 2019 (x64-based Systems) | from 10.0.17763.0, before 10.0.17763.9376 | 10.0.17763.9376 |
| Microsoft Windows Server 2019 (Server Core installation) (x64-based Systems) | from 10.0.17763.0, before 10.0.17763.9376 | 10.0.17763.9376 |
| Microsoft Windows Server 2022 (x64-based Systems) | from 10.0.20348.0, before 10.0.20348.5761 | 10.0.20348.5761 |
| Microsoft Windows Server 2025 (x64-based Systems) | from 10.0.26100.0, before 10.0.26100.33650 | 10.0.26100.33650 |
| Microsoft Windows Server 2025 (Server Core installation) (x64-based Systems) | from 10.0.26100.0, before 10.0.26100.33650 | 10.0.26100.33650 |
Advisories and fixes
- Vendor advisory msrc.microsoft.com
Scores and signals
- Exploitation
- No known exploitation
- Severity
- Critical, CVSS 9.8 (v3.1, scored by microsoft)
- EPSS
- 0.96% chance of exploitation in the next 30 days (EPSS from FIRST, as of Oct 24, 2026)
- CISA's SSVC decision points
- Exploitation: none. Automatable: yes. Technical impact: total. As of Oct 13, 2026.
- Weakness
- CWE-416: Use After Free
- Vendor
- Microsoft, Windows 10 Version 1607
Timeline
- First listed as critical by cve.now. Affected and fixed versions come from the CVE record, once one is published.